chrome: Cleanup class/struct forward declarations

chrome/browser/ui/app_list/app_list_controller_delegate_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_APP_LIST_APP_LIST_CONTROLLER_DELEGATE_IMPL_H_
 #define CHROME_BROWSER_UI_APP_LIST_APP_LIST_CONTROLLER_DELEGATE_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "chrome/browser/ui/app_list/app_list_controller_delegate.h"
 
-struct AppLaunchParams;
 class AppListService;
 class Profile;
 
 namespace base {
 class FilePath;
 }
 
 namespace extensions {
 class Extension;
 }
@@ skipping 34 matching lines @@
 
  private:
   void OnCloseCreateShortcutsPrompt(bool created);
 
   AppListService* service_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListControllerDelegateImpl);
 };
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_APP_LIST_CONTROLLER_DELEGATE_IMPL_H_